Hydrogen and helium trapping in hcp beryllium
Nikolai Zimber1, Judith Lammer2, Pavel Vladimirov3
1Karlsruhe Institute of Technology (KIT), Institute for Applied Materials - Applied Materials Physics (IAM-AWP), Eggenstein-Leopoldshafen, Germany. nikolai.zimber@kit.edu.
Communications Chemistry
|April 21, 2023
Summary
Hydrogen interacts with beryllium surfaces, forming complex hydrides. This discovery offers crucial insights into metal-hydrogen behavior, vital for fusion power plant safety.
Area of Science:
- Materials Science
- Surface Science
- Nuclear Engineering
Background:
- Hydrogen-metal interactions are critical for energy technologies and corrosion.
- Nanoscale understanding is limited by detection limits and hydrogen volatility.
Purpose of the Study:
- Investigate hydrogen adsorption on beryllium surfaces at the nanoscale.
- Characterize the composition and stability of hydrogen-metal interfaces.
Main Methods:
- Analytical spectroscopy in Transmission Electron Microscopy (TEM).
- In situ TEM heating experiments.
- Ab-initio calculations.
Main Results:
- Hydrogen directly adsorbs onto the (0001) surfaces of helium bubbles in neutron-irradiated beryllium.
- Aluminum, Silicon, and Magnesium were found at beryllium-bubble interfaces.
- Hydrogen desorption occurs above 400°C when helium content decreases.
Conclusions:
- A novel five-element complex hydride with high decomposition temperature is suggested.
- Findings provide new insights into metal-hydrogen interactions.
- Results are valuable for fusion power plant safety assessments.
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